Bringing Alaskan oil to market required one of the greatest engineering feats of the 20th century.

Bringing Alaskan oil to market required one of the greatest engineering feats of the 20th century. For more than three years, workers battled brutal Arctic weather to construct an 800-mile pipeline that would traverse three mountain ranges, 34 rivers and 800 streams, and that would withstand earthquakes and subzero temperatures. The men, machines and money the pipeline brought to Alaska would forever transform what had long been regarded America's last great wilderness.